Deep-well pump



V. L. FORSYTH DEEP WELL PUMP Jan. 5 1926.

1924 2 Sheef..S -Sheet` 1 Filed Dec. 10l

Jan. 5 1926.

V. L. FORSYTH DEEP WELL PUMP 1924 2 Sheets-Sheet 2 Filed Deo. 10

Siti.

Patented Jan. 5, 1926.

UNITED STATES VALOBIS L. FOBSYTH, 0F FOB'I' WORTH, TEXAS.

DEEP-WELL PUMP.

Appunti mea member 1o, 1924. semi 110.755,061.

T o all whom it may concern:

Be it known that l, VALoius L. FoRsY'rH, citizen of the United States ofAmerica, residing at Fort Worth, in the county of Tarrant and State ofTexas, have invented certain new and useful improvements in Deep-WellPumps, of which the following is a specification.

This invention ilates to new and useful improvements in deep well pumps.

One of the objects of the invention is the provision of a pump whichwill deliver a full capacity discharge of liquid from the well upon eachupward stroke.

Another object is to provide a liquid operated piston balanced betweenbodies of liquid and acquiring its upward stroke by hydraulic pressure;while its down stroke is eiected through a by-pass carrying the headpressure of the elevated and stored liquid as well as by the release ofthe hydraulic pressure.

Advantages of the invention reside in the elimination of sucker rods androd troubles; also the attainment of the full power applied and therequirement of less power; and the ability to use a very long strokepump.

A construction designed to carry out the invention will be hereinafterdescribed together with other features of the invention.

The invention will be more readily understood from a reading of thefollowing speciication and by reference to the accompanying drawings, inwhich an example of the invention is shown, and wherein:

Fig. 1 is a longitudinal vertical sectional view of a pump built inaccordance with my invention.

Fig. 2 is an enlarged cross-sectional view taken on the line 2,-2 ofFig. 1,

Fig. 3 is an enlarged cross-sectional view taken on the line 3--3 ofFig. 1,

Fig. 4 is an enlarged cross-sectional view on the line 4 of Fig. 1,

Fig. 5 is a fragmentary vertical sectional view of a modified form, and

Fig. 6 is an enlarged cross-sectional view on the line 6-6 of Fig. 5.

In the drawings the numeral 1 designates the enlarged intermediatesection or cylinder of a pump casing or barrel. A cap 13 screwed ontothe cylinder is reduced to reoeive the reduced casing section 2. A cap 8is screwed on the upper end of the cylinder and receivesI the reducedupper pump section 3.

The section 2 is screwed into a foot valve casing 12 having a foot valve10 therein. A piston 4 reciprocates in the cylinder 1 and has a reducedextension 6 projecting into the section 2 and an extension 5 projectinginto the section 3. The piston and extensions have a continuous axialbore a. A standing valve 11 is attached to the lower end of theextension 6 at the bore.

A stand pipe 7 has its lower end screwed into the cap 13, while itsupper end is screwed into a reducing elbow 21. The pipe 7 issubstantially parallel to the pump barrel. A horizontal pressure pumpcylinder 23 is screwed into the elbow. This cylinder may have anypractical length. A solid piston 22 o crates in the cylinder by a link25 operate by a crank arm 24 from a suitable power.

A check valve case 17 is screwed on the upper end of the casing 3, andincludes a check valve 15 preventing a downward flow of liquid. Thevalve 17 is fitted in a head 16 which has an elbow 16 at one side. Anipple 18 is screwed into the top of the head. A by-pass pipe 9 extendsfrom the elbow 16 down to the elbow 8 of the cap 8. The nipple 18 isconnected with a horizontal discharge pipe 2O by an elbow 19. The pipe20 is connected with a tank (not shown) which is arranged to maintain ahead pressure on the liquid above the valve 15 and in the bypass pipe 9.

To make the pump readyfor operation the parts 23, 7, 1, 9, 18 and 2()must be filled with oil or liquid and this may be done in any suitablemanner.

In operation the forward stroke of the piston 22 forces the stand of oilin pipe T into the space in the casing 1 below the piston 4. ThishydraulicI pressure forces the piston 4 upwardly or imparts its upwardstroke. The valve 10 is opened by the suction so that the space c isfilled with oil; while the valve 11 is closed, thus elevating the oil inthe bore of the piston and displacing it into the space b and past thevalve 15 into the pipe 20. Also as the piston moves upward the oil inthe space immediately above the piston 4 in the casing 1, is displacedinto the by-pass pipe 9 from which the oil is displaced into the columnabove the valve 15. The pipe 20 being conn a pressure exerted throughthe stand of :nested with e tanlr (not shown) so constant head pressureis maintained in the pipe 20 and nipple 318, .the oil from the byl sesis discharged against this head pressure.

The pistonis thus balanced except for the head pressure exerted throughthe b pass pipe 9. lhus upon the reverse st roe the piston 22, thepressure ofthe oil m the pipe 9 and in the cylinder is suiicient :torcethe piston 4 downwardly thus imparting its down stroke. lhe oil belowthe piston i being displaced into the pipe 7 releases the piston for itsdownward stroke. Upon the down stroke the valve ll is unseated and theoil or liquid collected in the space c is received into the bore a oiEthe piston and overflows into the space The piston l is elevated by thehydraulic liquid in the pipe 7 which acts as a ram. This pressure is oi'course relieved when the piston 22 is withdrawn so that the liquid mayback up in the pipe 7 and the head pressure on the liquid in the by-passpipe 9 will immediately act to Jforce the piston 4 downward. Thecylinder 23 may be long enough to allow of the piston 22 a stroke or"several feet, the cylinder l being made in proportion, thus giving acopious discharge of liquid at each upward stroke ln Figs. 5 and 6 Ihave shown a modiication in which a hook-wall or any type of packer 33is mounted on the casing section 2 above the foot valve l2. At the upperend of the casing 26 is a cap 27 from which the pipe 2O leads. A tubularcasting 28 is fastened on the top of the head 16 instead of the nipple18. This casting has a transverse web 29 which divides the casting, anda port 30 provides a discharge below web. An elbow 3l at the top of thecasting connects with the cylinder 23. An offset 32 above l the webconnects with the upper end of the stand pipe 7. The casing above thepacker 33 is filled with liquid which flows back from the pipe 20. Thisliquid is under the head pressure from the pipe 20 and the head pressureis exerted back through the port 30. through the offset wise theoperation Various changes in the size and shape of the different parts,as well as modification and alterations may be made within the scope ofthe appended claims What I claim, is:

l. A deep well pump comprising a casing having a plurality of members,unions joining said members together, a foot valve in the lower end ofthe. bottom casing member, a piston adapted to operate in the central 32to the pipe 7, otheris the same.

member and extending therefrom into the l other two members, a bore insaid piston, a checa valve 1n the lower portion of the pis- The piston22 displaces the liquid ton bore, a check valve et upper member, apulsator, a pipe from the said pump to the bottom of the central member,an outlet above the upper member and a by-pass pipe from the top of thelower members to the point of juncture of the upper member and theoutlet pipe.

2. ln a deep well pump equipment, a cylinder having three members,uni-ons adapted to join said members together, a bored piston adapted tomove in the central member, and having extensions into the other twomembers. a check valve in the bottom of the bored piston, a foot valvebelow the piston in the lower end of the bottom cylinder member, a pipeextending into the bottom of the middle cylinder member from a singlecylinder force pulsator, a by-pass pipe extending from the juncture ofthe upper and middle cylinder members to the top or" the upper member,an outlet from the upper member, and a check valve in the top of theupper member.

3. ln a deep well pump assemblage, a cylinder comprised of three memberssuitably joined together in alignment, a piston having a centrallongitudinal bore and adapted to be movably mounted in the cylinder, aliquid inlet below the piston, means for cennecting said inlet to asingle cylinder pulsator, a by-pass between the top of the celltermember of the cylinder and the outlet of the top of the cylinder, acheck valve'in the cylinder below the outlet, a check valve in thebottom of the piston bore, and a foot valve below the cylinder.

4. In a deep well pump, an intermediate casing, reduced upper and lowercasings connected with thefintermediate casing, a piston working in theintermediate casing and having extensions having a working tit in thereduced casings, said piston and extensions raving a continuous axialbore, a foot valve at the bottom of the lower casing, a valve in thelower end of the bore of the piston, a. valve at the top of the uppercasing, a liquid discharge pipe leading from the upper casing, a fiuidpressure p1pe connected with the lower end of the intermediate casing,means for displacing the fluid from said pipe into the intermediatecasing and conducting means extending from the liquid dischar e pipe tothe upper portion of the interme i- Vate casmg.

5. In a deep well pump, an intermediate casing, reduced upper and lowercasings connected with the lntermediate casing, a piston working in theintermediate casing and having extensions working in the reducedcasings, said piston and extensions having a continuous axial bore, afoot valve at the bottom of the lower casing, a valve in the ower end ofthe bore of the piston, a valve at the top of the upper casing, a liquiddischarge pipe leading from the upper casing,

the top of the a iuid pressure pipe connected with the lower end of theintermediate casing, means for displacing the fluid from said pipe intothe intermediate casing, and a by-pass pipe lea/ding from the upper endof the intermediate Y casing to the upper casing at a point above thevalve thereof.

6. Means for deep well umping comprisin an intermediate c liner andconnected re uced casings, a ba anced tubular piston in said cylinderextended to communicate with said casings, a fluid ressure conductorconnected with the cylin er to actuate said piston, and a byass extendedfrom the cilinder to a oint yond the delivery from t e piston, w erebythe iiuid above and below the piston may move therewith to balance thesame.

7. In a balanced pump, a vertical container, a balanced p1ston thereinhaving a iluid conducting bore extending therethrough and a valve at thelower end of the bore, whereby the fluid below the piston is elevatedtherethrough, means for varying the pressure upon a body7 of fluid foractuating the piston in one direction, and a bypass pipe from a pointbeyond the delivery from said piston extending to said container t0actuate. the piston in an op osite direction.

In testimony whereof I a X my signature.

vALoRIs L. FORSYTH.

